Oh no! I am not much help as we had similiar issues - DD1 would not and still doesn't sleep with us, she'd rather play! Very annoying as she was so happy whilst were pretty grumpy... One of us ended up crashing on her floor for a week, it took a few days but she eventually just rolled over and then went back to sleep - we were just there but didn't chat/play - seemed to work for a while anyway.
Sleep deprivation is awful - hope that things change for you soon. FWIW - My DH went away for a week when bub was 8 weeks and DD1 had been a shocker up until then - the whole week she was great, not sure why!
GL - it is a daunting prospect.